Valve.



E. A. NELSON.

VALVE.

APPLIUATTON FILED FEB. 5, 1910.

1,040,788. Patented Oct. 8, 1912.

,narran sra'rae ramena carica.,

EMIL A. NELSON, 0F DETROIT, MICHIGAN, ASSIGNOR T0 ROTARY VALVE MOTORCOMPANY, OF DETROIT, MICHIGAN, A. CORPORATION OF MICHIGAN.

VALVE.

peoication of Letters Yatent.

Patented Oct 8, 1912.

Application led February 5, `1910. Serial No. 542,191.

To all whom 'it may concern:

Be it lmown that I, EMIL A. NELSON, a citizen of the United States ofAmerica, residing at Detroit, in the county of Wayne and tate ofMichigan, have invented certain new and useful Improvements in Valves,of which the followin is a specification, reference being had tlerein tothe accompanying drawings.

The invention relates to valves more particularly esigned for use inexplosion engines, and it is the object of the invention to providemeans'for sealing and lubricating the valve without danger of feeding anexcess of the lubricant into the valve case, thereby avoidingcarbonization.

To this end, the invention consists in the construction as hereinafterset forth.

In the drawings, Figure l is a section through a ortion of the casing ofan explosion engine, to which my im roved valve is applied; Fig. 2 is alongitu inal section through a portion of the valve; Fig. 3 is adiagrammatic section through an explosion engine provided with myimproved construction of valve for both inlet and cxhaust; Fig. l is avhorizontal section through the valve case` with the valve removed,showing a modilied construction;`and Fig. 5 is a sectional view of amodified construction.

My improved valve is preferably of the rotary type and, as shown, A is acylindrical valve easing. B is a rotary valve therein which Visaccurately fitted to its seat with only sufficient clearance to providefreedom of movement.,

C is a channel extending longitudinally of the valve case, so as to betransverse tothe direction of the movement of the valve. This channel,as shown, is formed in the lower portion of the valve ease A, and ispreferably of suiiicicnt area to provide free passage for a volume ofthe lubricant.

D is a segmental insert, which closes the opening of the channel C intothe valve case. This insert is seated upon shoulders E, and is so fittedas to provide a slight clearance preferably only a few thousandths of aninch between said sides and the walls of the groove or channel.

v The channel C extends the complete length of the case, and isconnected at its opposite ends with conduits F and G, which referablyconnect it with a circulatory lu ricating systemT Thus when the engineis in operation a stream of lubricant is constant] passed through thechannel C which is pre orably at a pressure higher than atmosphere.

With the construction described the lubricant in the channel C, whichwill be forced upward through the restricted passage between the insertand the walls of the channel, and a film of oil passes through thispassage and into the space between the rotary valve B and its seat. Thisfilm is uniformly distributed over the entire length of the valve, andby its rotation is distributed around the scat, so as to maintain afluid seal.

The valve B is provided with ports H, which register with coperatingports I and J in the valve case. The port H, during the rotation of thevalve, crosses the insert D and oil channel, but on account of the retoAstricted width of the slit 'which forms the oil channel a ilow of oilinto the port is prevented. Thus the port is kept free from.

deposit of the lubricant, which avoids dan'- ger of carbcnization. v

My construction of valve may be applied to an explosion engine 'for boththe inlet and exhaust valves, as shown in Fig. 3, and is also applicableto enfines of the multi-cylinder type. For the latter construction, therotary valve extends continuously to the several cylinders, and isprovided with ports for coperating with the individual ports of thecylinders. To prevent danger of leakage from one port to another,expansible rings K are arranged intermediate the cylinders preferably ingrooves formed in the valve. y

It is usual to lubricate the internal mechanism of engines of this typeby a splash system, and to provide means for maintaining a constantlevel of the lubricant in the lower portion of the crank case. Thisconstant4 level is maintained by a pump, which constantly dischargeslubricant in the crank case, an overflow beine' provided for discharging'the surplus ltibricant.

With my construction a pump L' is provided for elevating the lubricant,which is then passed through the conduits F, C and e p the channel C.

` of said valve and seat, said slit "stricted in width for tor thepassage l lln the construction shown in Fig. 5, 'the Width of the slitor clearance space is adjust able, so as to vary the restriction. This1s accomplishedl loy making the insert D ofl r ine the Width ot' tileclearance s ace.

Thus the clearance may he restricted until Waste oi o il is preventedWithoutI interfering With the successful operation of the valve.

HVYlnat l claim asi my invention is:

l. In an explosion engine, the combination With a valve anda valve seat,of a channel extending transverse to the movement of said valve on it-sseat, and a slit extending from said channel to the contactingfacesbeing` rethe passage of a liquid ilin therethrough 2. ln an explosionengine, the combination With a rotary valve and a seat therefor, of

'a' channel extendingtransverse to the movement of said valve acrosssaid seat, and a slit connecting said channel with. the contacting facesof said valve and seat, said slit being restricted in Width for thepassage of a liquid film therethrough.

ln an explosion engine, the combination with a rotary valve and a valveseat therefor, of a groove or channel formed in the ene extendingtransverse to the movement of the valve, and a segmental insert in themouth ot saidchannel having a restricted clear'- ance for the passage ota liquid film.

e. ln an elxplosionfengine, the combination with a rotary cylindricalvalve and a cylindrical seat therefor, of a channel eX- tendinglongitudinally ot one of said menibers, and a segmental insert in themouth of said channel having a restricted clearance of a liquid lilin.

'5. ln an explosion engine, the combination With a cylindrical valve, ofa'cylindrical valve seat therefor formed With a slightclearancetherebetween, of a groove or channel formed longitudinally otsaid valve seat,

a segmental insert in the mouth of saidl '7. ln an explosion engine,thecombination` with a valve and its seat, of a channel eX- tending`parallel through the contacting faces ot said valve and' seat, a slitconnecting said channel with the tace of said seat, and means toradjusting the Width of said slit, ter the purpose described. l i

' 8. lfn an explosion engine, the combination with a valve and itsseat,of achannel eX- tending' parallel to the contacting faces of said valve`and seat and tapering` from one end toward the other, and acorrespondingly tapered insert in said channel-torming a restrictedclearance space tor the passag-e of the liquid film from said channel tosaid seat. Y

9. In an explosion engine, the combination with a valve and its seat, ota channel eX- tcnding parallel to the contacting faces of' said valveand seat and tapering from one end toward the other, a correspondinglyvtapered insert in said channel, and means operable from outside thecase for adjusting said insert to vary the Width of the clearance spacebetween the same and the channel.

ln testimony whereof l aliiX my signature in presence of two Witnesses.

Ell/HL A. NELSON.

